William hover



(Model.)

W. HOVER.

LOCK.

No. 426,273. Patented Apr. 22,1890.

- UNITED STATES PATENT OFFICE.

WILLIAM HOVER, OF FREEPORT, ILLINOIS.

LOCK.

SPECIFICATION forming part of Letters Patent No. 426,273, dated April22, 1890.

Application filed August 30, 1889. Serial No. 322,469.- (Model T0 allwhom it may concern:

Be it known that I, WILLiAM HOVER, of Freeport, in the count-y ofStephenson and State of Illinois, have invented a new and usefulImprovement in Locks, of which the following is a full, clear, andexact. description.

The object of my invention is to provide a strong safe-door lock, theconstruction of which is proof against plastic impressions by burglarsfrom which to make duplicate keys.

To this end my invention consists in the construction and thecombination of parts, as hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in the drawings.

Figure l represents an exact elevation of the lock with the top plateremoved. Fig. 2 is a longitudinal horizontal section of the lock. Figs.3, fl, 5, 6, and 7 are representations of the various operative parts ofthe lock. Fig. 8 is a top plan of same.

The bolt A is made with a cross-bar F., and is operated by a cam B,through which runs a rod at the point II, to the ends of which are fixedthe usual knobs. A reciprocating` lever D is pivotally attached to thebolt at F, and has a flat spring R lying between said lever and bolt,and abuts against said lever, holding same in place, and at the sametime being compact and taking up little space in the construction oflock. Said reciprocating lever is adapted to engage a post set in thecase at g, which, when engaged at the post, locks the bolt out and holdsit fixed in place, thus locking the door, to which the lock may beattached. Two slidenplates K and L lie along the two sides of the boltA, which slides longitudinally when put in operation by the action ofthe cam B. The slide-plate K lies above the reciprocating lever, asshown in Fig. 2, and is provided with a flat spring, which bears againstthe side of case, said spring preventing displacement of plate shouldthe lock be jarred, the purpose of said plate being, when pushed to thelett, the bolt being projected, to hold the reciprocating lever inengagement with the post at f, for when said slide-plate is pushed underthe reciprocating lever further movement is stopped by the lip inmeeting with slidc-plate K. Pushing the said plate to the right allowsroom for the action and consequent disengagement of the reciprocatinglever, and the bolt may again be operated by the cam B. The purpose ofthe slide-plate L is to open and close the aperture in the face of thelock where the key is inserted, and lies along the under side of thebolt, as shown in Fig. 2, and has also a fiat spring b abutting againstthe case. The lock is also provided with a slipbolt O, by which the doormay be bolted on the inside, said bolt being held positively by afriction-spring S abutting against the arm of bolt and side of plate.The larger bolt A is held projected by a spring a., one end of which iscurled over a post b and the other free end fitting into a recess intothe transverse bar of the bolt.

The operation of locking the door to which the lock may be attached isas follows: The key M is inserted in the opening I, Fig. S, of the faceof the lock, and is then placed in the slot n of the slide-plate L. Saidplate is pushed aside, leaving the opening clear for the furtherinsertion of the key, which is placed against the reciprocating lever,and upon pressing down upon same saidv lever will engage with the postat g, and a further insertion of the key until it is between the twoshoulders e e of slide-plate K and the plate pushed to the left willprohibit any inward movement of the latch or lock, as has beenhereinbefore described. The key is now used to push plate L back againand the keyhole is closed.

To unlock, reverse the process j ust described.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, isM

l. In a lock of the character described, the combination of a main bolt,actuated by a spring and knob attachment alternately in oppositedirections, with a pair of plates pro vided with springs and recessesopening in opposite directions with relation to each other, and disposedand operating at two different sides of the main bolt, and a pivotalcatch, substantially as described.

2. A lock of the character described, con sisting of a main bolt andcasing provided with a stationary projection, in combination With anotched pivotal reciprocating lever pivotal lever with the projectioninthe casing, pivoted to the main bolt, and a longitudinallyasspecified. IO sliding recess-plate provided with a spring In testimonywhereof Iaix mysignatnre in and adapted to slide to and from between thepresence of two Witnesses.

casing and the rear end of the pivotal lever, VILLIAM HOVER.

all constructed and combined to operate Sub- Vitnesses: stantially asdescribedmhereby the lock may JOHN W. COCHRAN, be made positive by theengagement of the A. L. GREEN.

